Hey, i would like to know how to find out which website is in what niche, like if that website is good for me to link exchange or no? Example: My website is www.htportal.org it have funny news, funny videos, funny pictures and funny forum. And yeah i have games on it too. So does that mean i can exchange with all other sites that have one of this things on they site or im not understanding this same niche link exchanges.
Link exchanges will be worthless to Google however if you are within your niche you can likely drive incremental traffic to your sites. Yes you can exchange with the same type of sites..
As others pointed out link exchanges are nearly useless. But if still want to go ahead with link exchanges you can try jokes sites as well as other videos/humor sites like www.joostick.com (not mine)